In that file comment out the current logging property and uncomment the line for the "NoOpLog", below is a copy of the line to uncomment
org.apache.commons.logging.Log=org.apache.commons.logging.impl.NoOpLog

That logging is coming from axis2 and is for generated client code. We already log any exceptions that we get when invoking a client into the product's main logs so I would not expect the axis2.log to be needed for any troubleshooting sessions.